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复方珊瑚
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计量泵不上量? 我厂一台 计量泵 最近发生不上量的情况,一点量都没有,我们对 单向阀 都检查了,发现两个单向阀都被介质堵住了,清理后,试泵还是没有量,请大家分析分析查看更多 4个回答 . 4人已关注
合成氨联产甲醇系统的安全评价及控制措施? 近年来,随着市场变化和企业发展要求,甲醇生产厂家似雨后春笋般出现。氨联产甲醇装置项目的开发和推广,弥补了国内市场的产品缺口,给生产企业带来了丰厚的利润,提高企业经济效益和市场竞争力。产品种类增加,物料种类会相应增加。加之新老装置联产,原有装置系统的设备、工艺线路等也要进行局部调整,继而带来操作规程、开停车程序、方案及指挥系统的调整。两套装置一个系统,要保证合成氨、甲醇生产都在最佳工况下进行,加重了部分工段从供给高要求物料组分和全系统生产指挥科学性的难度。整个系统在运行过程中,所用的原料、 中间体 及最终产品对人体都有不同程度的危害性,轻则损害人体健康,重则危及生命。根据生产过程的危险特性,一旦发生指挥失误、误操作、报警装置失灵、安全联锁失效、处理不及时或处理方法不当等,就会发生泄漏和超温超压现象,进而引起火灾、爆炸、灼烫、中毒窒息等事故,危及员工人身和企业财产安全,严重时可能危及附近居民的生命和财产安全,造成严重的恶性事故。氨联产甲醇生产,在高温、高压、易燃、易爆、易中毒和易腐蚀环境中进行,对操作及指挥者提出了更高标准的要求。 1 物料的危害辨识及危险性评价 1.1 生产过程中的物料 1.1.1 一氧化碳(CO) 1.1.1.1 危害性辨识 一氧化碳经呼吸道吸入人体后,通过肺泡膜进入血液,与血液中 血红蛋白 进行可逆性结合,形成碳氧血红蛋白,使血液中的携氧功能发生障碍,造成人体低氧血症,因而导致组织缺氧。轻度中毒者会出现头疼、眩晕、耳鸣、眼花,颞部压迫及博动感,并有恶心、呕吐,心前区疼痛或心悸,四肢无力,甚至有短暂的昏厥;中度中毒者除上述症状外,初期尚有多汗、烦燥,步态不稳,皮肤粘膜樱红,可出现意识模糊,甚至进入昏迷状态;重度中毒者迅速进入昏迷,昏迷可持续数小时或更长时间,出现阵发性和强直性痉挛,有病理反射出现,常伴发脑水肿、肺水肿、心肌损害、心律紊乱或传导阻滞,高热或惊厥,皮肤、粘膜可呈樱红色或苍白、紫绀。 1.1.1.2 危险性评价 一氧化碳属易燃、易爆、有毒气体,与空气混合浓度在12.5%~74.2%时成为爆炸混合物,爆炸危险度为4.9。遇热容器压力增大,泄漏遇火种有燃烧爆炸的危险。GB 13690—92标准将该物质划分为第2.1类易燃气体;GB 12268—90标准规定其危规号为21005。 1.1.2 二氧化碳(CO2) 1.1.2.1 危害性辨识 低浓度二氧化碳对呼吸中枢有致兴奋作用,高浓度有显著性的麻痹作用。二氧化碳透过肺泡能力比氧大25倍,空气中CO2浓度高时,必造成体内CO2滞留,缺氧引起窒息死亡。即使在含氧浓度较高的情况下,二氧化碳也可以引发中毒。有时缺氧窒息会与二氧化碳中毒并存。吸入浓度为8%~10%的CO2,除头昏、头痛、眼花和耳鸣外,还有气急,脉博加快、无力,血压升高,精神兴奋,肌肉痉挛,时间过长则会出现神志丧失。急性重症发作都在几 秒钟内,几乎象触电似的倒下,表现为昏迷,反射消失,瞳孔扩大或缩小,大小便失禁,呕吐等。严重者会出现呼吸停止或休克。 1.1.2.2 危险性评价 受热后容器压力增大,有爆炸危险。GB 13690—92标准将该物质划分为第2.2类不燃气体;GB 12268—90标准规定其危规号为22019。 1.1.3 氢气(H2) 1.1.3.1 危害性辨识 氢气在生理上属惰性气体,仅在高浓度时,由于空气中氧分压降低才能引起窒息。在很高的分压下,氢气可呈现出麻醉作用。 1.1.3.2 危险性评价 氢属易燃易爆物质,与空气混合浓度在4.0%~75.6%时成为爆炸混合物,爆炸危险度17.9。氢气比空气轻,在室内使用和储存时,泄漏气体会聚集在上部空间不易外排,遇火即引起爆炸。GB 13690—92将该物质划分为第2.1类易燃气体;GB 12268—90标准规定其危规号为21001。 1.1.4 硫化氢(H2S) 1.1.4.1 危害性辨识 硫化氢是强烈的神经性毒物,对粘膜有明显刺激作用,随空气经呼吸道和消化道能很快被人体吸收。一部分可经呼吸道排出,另一部分在血液中很快被氧化为无毒的硫酸盐和硫化酸盐等经尿道排出;在血液中来不及氧化时,则引起全身中毒反应。体内达到较高浓度时,首先对呼吸中枢和脊髓运动中枢产生兴奋作用,然后转为抑制;高浓度时则引起颈动脉寞的反射作用使呼吸停止;更高浓度时可直接麻痹呼吸中枢而立即引起窒息,造成“闪电式”中毒以致死亡。轻度中毒者首先出现眼结膜刺激病状,接着是呼吸道刺激症状,表现为畏光、流泪、眼刺激、流鼻涕及咽喉灼热感;当接触浓度为200~300mg/m3时,会发生中度中毒,症状为头痛、头晕、全身无力、呕吐,同时引起上呼吸道炎和支气管炎。眼刺激症状强烈、流泪、眼刺痛,且有眼睑痉挛,看光源时周围有色环存在,视觉模糊,有角膜水肿的症兆;当接触浓度在700mg/m3以上时,会发生重度中毒,中枢神经系统症状最突出。出现头晕、呼吸困难,行动迟钝,继而出现烦燥,意识模糊,呕吐、腹泻,很快处于昏迷状态,最终可因呼吸麻痹而死亡;当接触浓度在1000mg/m3以上时,可发生“电击样”中毒,即在数秒钟后突然倒下,瞬间呼吸停止。 1.1.4.2 危险性评价 硫化氢属易燃剧毒液化气体,人的嗅觉阈为0.035mg/m3,起初是臭鸡蛋味增强与浓度成正比,当浓度超过10mg/m3时,浓度增高而臭鸡蛋味却减弱,以至不能察觉。与空气混合,当浓度在4.3%~45.0%时,形成爆炸性混合物,爆炸危险度为9.5。气体泄漏遇火源会发生燃烧爆炸。GB 13690—92标准将该物质划分为第2.1类易燃气体;GB 12268—90标准规定其危规号为21006。 1.1.5 氮气(N2) 1.1.5.1 危害性辨识 氮气是无色、无臭、无味的气体,是空气的重要组成部分。微溶于水,化学性质稳定。氮气本身并无毒,但当环境中氮气增多致使氧气相对减少,会引起单纯性窒息。其主要表现是机体缺氧,出现头晕、头痛、呼息困难、急促,心跳加快,脉搏弱而快,精神恍惚不安,全身乏力,肌肉协调运动失调。若进入完全充满氮气的设备或容器中,人会立即昏倒窒息。 1.1.5.2 危险性评价 氮气属难视觉性物质,高纯度氮气环境中易发生窒息甚至死亡事故。超压贮存有爆炸危险。GB 13690—92标准将该物质划分为第2.2类不燃气体;GB 12268—90标准规定其危规号为22005。 1.2 成品物料 1.2.1 液氨(NH3) 1.2.1.1 危害性辨识 氨属于低毒类物质。氨随空气经呼吸道吸入后,通过肺泡,除少部分与二氧化碳中和外,其余被血液吸收。被吸收的氨,在肝脏中释出形成尿素,随汗液、尿或呼吸道排出体外。氨对人的呼吸道有刺激和腐蚀作用,浓度过高时,直接接触部分可引起碱化学灼伤,组织呈溶解性坏死,并可引起呼吸道深部及肺泡的损伤,发生化学性支气管炎、肺炎和肺水肿。高浓度吸入,可使中枢神经系统兴奋度增强,引起痉挛,并可通过三叉神经末稍的反射作用引起心脏停搏和呼吸停止。轻度中毒,眼、口有辣感、流泪、流涕、咳嗽、声音嘶哑,吞咽困难,头昏、头痛,眼结膜充血水肿,口唇及口腔、咽部充血,胸闷和胸骨区疼痛;重度中毒,喉头水肿,声门狭窄以及呼吸道粘膜脱落,造成气管阻塞,引起窒息,人体外露部分皮肤可出现Ⅱ度化学灼伤,眼睑、口唇、鼻腔、咽部及喉头水肿,咳吐大量黄痰;肺水肿很快发生,表现为剧烈咳嗽,呼吸困难;脉快而弱,体温升高,咳出血痰或大量粉红色泡沫痰,陷入休克昏迷。 1.2.1.2 危险性评价 受到猛烈撞击,贮器损坏时,气体外泄会危及人的健康和生命,遇水则变为有腐蚀性的氨水。28%的水溶液则为浓氨水。受热后容器内压力增大或空气中氨浓度在15.7%~27.4%时,遇到火星会引起燃烧爆炸,爆炸危险度为0.9。有油类存在时,更会增加燃烧危险。GB 13690—92标准将该物质划分为第2.3类有毒气体;GB 12268—90标准规定其危规号为23003。 1.2.2 甲醇(CH3OH) 1.2.2.1 危害性辨识 甲醇的职业接触中毒物质危害程度分为三级,急性中毒主要表现为中枢神经系统损害,眼部损害和代谢性酸中毒。人吸入空气中甲醇浓度39.3~65.5g/m3,30~60分钟可致中毒。人体口服中毒最低剂量为0.1g/kg,经口摄入0.3~1.0g可致死。 1.2.2.2 危险性评价 甲醇是易燃、易爆、有毒性物质。其气体与空气混合能形成爆炸性混合物,爆炸极限为5.5%~36.0%,爆炸危险度为5.5。饮用后会使人失明,甚至死亡。GB 13690—92标准将该物质划分为第3.2类中闪点液体;GB 12268—90标准规定其危规号为32058。 2 系统运行中的安全控制措施 2.1 开展对员工的安全教育和技能培训 2.1.1 坚持开展新员工入厂“三级”安全教育和全员日常安全知识教育和培训,及时传达和宣传党和国家的安全生产方针、政策和法规,学习企业的安全通则及有关防火、防爆、防毒、防尘、急救等安全技术知识,使安全警钟长鸣。 2.1.2 针对装置的增加和调整,组织专门的安全技术知识教育和培训活动,对新装置员工做好转岗和入岗教育,对系统所有员工进行新技术、新设备、新工艺、新方法和新知识的再提高教育,及时完成管理和操作知识、方法的转变,防止因新技术及安全规章制度教育的滞后而产生安全纰漏。 2.1.3 建立懂技术、懂管理、热爱安全生产管理工作的高素质安全管理队伍,在管理实践的同时,积极参加各种形式的学习培训活动,不断进行自我“充电”,随时掌握现代化管理的新理论、新方法,及时更新管理理念,吸收国内外安全管理、安全技术新经验,促进企业安全管理的现代化。 2.1.4 采取专门、委托或代培的形式,做好特殊工种的专业安全知识及技能培训工作,经政府职能管理部门考核合格并取得资格证书,杜绝无证上岗现象。 2.1.5 开展定期班组安全教育活动,介绍、学习生产过程中突发情况的处理方法和国内外同类企业的典型事故案例,提高员工判断和处理问题的能力。 2.1.6 制定并组织演练事故应急预案。确保事故状态下,组织、指挥、通讯、物资供应、安全警戒、实施救援及恢复生产等工作能有条不紊地进行,把人员伤害和财产损失降低到最低限度。 2.2 创造安全的作业环境 2.2.1 新建甲醇装置必须做到“三同时”,即通风、防火防爆、防尘、防毒等安全设施必须与主体工程同时设计、同时施工、同时投产。项目要严格执行各项申报制度,经过安全评估和竣工验收合格,取得安全生产许可证。对原合成氨装置的调整改造,要结合原料路线、工艺流程的改造或更新,消除一切不安全因素和一切产生尘毒的因素。管好、用好现有设备,消除跑、冒、滴、漏,控制并消除尘毒危害,防止职业病发生。 2.2.2 建立环境及安全监测制度,控制排放量及污染因子浓度。包括空间及地沟等处尘毒浓度必须控制在最高容许浓度之内(一氧化碳30mg/m3,氨30mg/m3,硫化氢10mg/m3,甲醇50mg/m3),对超标区域,查明原因,及时采取措施进行整改。 2.2.3 严格执行检修规程及票证管理制度,大、小检修项目都要制定检修方案及安全防范措施,办理《检修任务书》。动火要办《动火作业安全许可证》,进塔入罐要办《设备内作业安全许可证》,做到票证齐全,项目落实、措施落实、责任落实。 2.2.4 按规定配置充足、适用的灭火器材和气防器材,并定期检查和维护保养,确保处于良好备用状态。 2.3 落实《危险化学品安全管理条例》,加强危险源管理 建立危险化学品管理制度和台帐,对危险化学品进行辨识、评价和登记注册。危险源(点)区域要张挂警示标牌,标明其名称、管理级别、危险严重度、安全防范措施、责任人等。重点危险源(点)要有突发事故应急预案、泄漏报警装置、 监测仪 、紧急切断装置、医疗救护设施、安全检测工具合格并保持灵敏、可靠,编制专用检查表,定期开展危险源(点)专业检查,发现隐患,及时整改 2.4 加强工艺管理,严格执行操作规程 生产指挥调度要统筹兼顾,全面考虑,科学管理,平衡好合成氨及甲醇两个装置的生产。选择最佳工况,并在实践中进一步完善和提高,杜绝超温、超压、超负荷运行。操作人员要认真学习本岗位操作规程,精心操作,练就过硬的操作本领。同时要熟悉本岗位存在的危害及可能发生的危险,会熟练使用消防及气防器材,对生产过程中出现的异常情况能够采取积极主动的应急处理方法和措施。 2.5 全面落实安全生产责任制 安全管理是系统工程,面对的人、机、料、法、环,贯穿于企业生产的所有过程和环节。推行安全生产责任制,全员分级、分类签订安全生产责任书,明确安全管理方针、目标和保证措施,促使员工在实际工作中恪尽职守,遵章守纪,认真履行安全生产权利和义务,企业才能保持长久的安全运行态势,整体安全生产目标才能实现。作为安全技术管理职能部门,要积极发挥监督检查和管理作用,严格执行各项安全规章制度,强化现场走动管理,及时发现和消除隐患;考核兑现,奖罚分明,为企业的安全生产保驾护航。 3 结束语 氨联产甲醇工艺有单塔、双塔及多塔工艺,采用原料有煤、天然气等。本文所述的是以煤为原料的单塔或双塔工艺。不论何种工艺、原料,生产过程的物料没有太大的差别,加之化工生产具有的共同生产特点,所以对整个运行过程的安全管理也是大同小异。查看更多 0个回答 . 1人已关注
降液板为什么这样改呀? 图中圈出来的部分,为什么这样改呀? 查看更多 12个回答 . 1人已关注
气动隔膜泵能作为循环水泵用吗? 求助各位川友,请问 气动隔膜泵 能作为循环水泵用吗?查看更多 4个回答 . 4人已关注
这年头做涡街流量计的太乱了? 乱七八糟,所谓温压补偿的,居然仅仅是就表头上显示了一下温度跟压力,我进入菜单一看,蒸汽的密度还是设置的妥妥的,我想问,既然密度是设定好的,温度探头跟压力探头要来何用呢,不就是装装样子的么,还请生产这些 流量计 的进来好好说说是怎么回事/ 查看更多 3个回答 . 2人已关注
“全球首套煤基乙醇工业示范项目”入选中科院年度科技创 ...? “全球首套煤基乙醇工业示范项目”入选中科院年度科技创新亮点成果 作者/来源: 日期: 2018-01-26 点击率:19 1月25日获悉, “全球首套煤基乙醇工业示范项目投产成功”入选中科院2017年年度科技创新亮点成果,排名第三。 采用中科院大连化物所和延长石油共同研发的的全球首套煤基乙醇工业化项目——延长石油10万吨/年合成气制乙醇装置2017年成功打通全流程,产出合格 无水乙醇 。 据了解,中科院大连化物所科研团队于2010年开展“煤基乙醇技术关键 催化剂 ”的研究开发工作,并于2013年实现关键 二甲醚 羰基化催化剂活性和寿命的突破。2014年中科院大连化物所和延长石油启动“10万吨/年合成气制乙醇工业示范”项目,2016年底项目开始试车,2017年1月11日产出合格产品,产品纯度达到99.71%,主要指标均达到或优于设计值。查看更多 2个回答 . 1人已关注
海南或是海南附近的省份,哪里有回收废催化剂的厂家? 一个朋友的企业每年有大量的含镍钒的固体残渣,含量可观,希望在海南周边寻求回收厂家。 金属镍 钒含量较高,厂子在海南; 查看更多 1个回答 . 2人已关注
这种高塔尿基复合肥的流程可以吗,急急急? 一般高塔工艺流程是将 磷酸一铵 、氯化钾和辅料混合后预热再与尿液一起进入1#、2#混合槽。我们的流程未采用粉体预热工艺,直接将氯化钾、辅料与尿液一起进入1#混合槽,出来后与磷酸一铵一起进入2#混合槽,但1#混合槽内设计有盘管,请教各位同行专家,哪种流程好. 研究院说: 两种流程主要区别之一是固体加热还是料浆加热,固体加热的传热效率较低,磷铵的热敏性较高,容易结块,一般加热温度≤85℃,固体 加热器 在使用过程中叶片较易磨损,开停车较不易。料浆加热的传热效率较高,设备操作弹性较大。 由于细颗粒返回造粒系统,为了保证 造粒机 的正常运转,较好的方法是将细颗粒全部或大部分熔解。由于氮磷钾料浆的粘度远大于氮钾料浆,在 “老流程”中 返料的熔解较为困难,而 “ 现流程”中将返料熔解在氮钾料浆中相对较易,对正常操作较为有利。 查看更多 2个回答 . 3人已关注
求硫酸安全技术说明书模板? 最近我公司的 硫酸 登记证即将到期,政府网站的硫酸技术说明书预审核一直没通过,硫酸GHS图像及危险说明、硫酸技术说明书一直没通过,请各位帮帮忙..谢谢! 查看更多 1个回答 . 3人已关注
请问大家有谁做过常压反相柱吗? 能否提供一些资料,或经验?谢谢。查看更多 2个回答 . 5人已关注
脱氯的蒸汽喷射器? 请大家解释一下脱氯单元的蒸汽 喷射器 的原理,它进口抽的气体是不是 氯气 和蒸汽的 混合气 体,一般选用什么材质?谢谢 # hcbbs 查看更多 8个回答 . 3人已关注
怎样防止1,2,4-三氮唑在高温下的聚合? 请教各位: 1,2,4- 三氮唑 在高温下会聚合,请问是怎么聚合的?如何能防止其聚合?查看更多 1个回答 . 1人已关注
一个简单的关于泵的扬程的问题? 一个简单的问题,但是工作了竟然没有信心确认了,到这里来确认一下; 我有一个 蒸汽发生器 ,里面蒸汽压力2.3Mpa。 外面供水有个水箱,如果水箱是常压,通过泵往蒸汽发生器供水,是不是泵的扬程最起码要230m。 如果水箱里加压,比如加压到2.0Mpa,用泵将水箱里水打到蒸汽发生器,是不是泵的扬程只要30m就够了。 查看更多 7个回答 . 4人已关注
求反应部分缓释剂注入量怎么计算? 近期我们的高分酸性水铁离子含量超标,大约在6g/l,请问缓释剂注入量应该在多少?怎么计算?谢谢告知!查看更多 9个回答 . 5人已关注
2005年石油英语水平考试(真题)--? 2005年 石油英 语水平考试(真题)--2005 试卷类型:01 单位 姓名 考号 考场 考点, 试卷一得分 试卷二得分 总分 答卷注意事项 1、请各位考生拿到试卷以后首先检查试卷类型(在本页右上角)是否和自己的准考证号末两位一致,如不一致请立即要求监考教师更换,否则将影响成绩。 2、本次考试包括试卷一和试卷二,考试时间为9:00—11:00。试卷一为客观选择题,在标准答题卡上用2B铅笔将所选答案划出。试卷二为翻译题,将译文写在答题纸上,填上单位、姓名、准考证号、考场号、考点,以备核对总分。 3、试卷一为标准化考试,所有答案必须在标准化答题卡上划出, 若答在试卷上不予评分,后果自负。 4、在填写标准化答题卡时应注意: 1) 在填写“姓名、单位、准考证号”等栏目时,应用钢笔或圆珠笔。在填涂准考证号时,一律用2B铅笔划横线。注意准考证号不要漏涂或涂错,否则客观题部分将无成绩,责任由考生本人自负。 2) 试卷一答题时一律用2B铅笔,若用钢笔或圆珠笔答题均无效,请按答题卡上“正确填涂”的示范划横线,横线长度和宽度以方框为准。若划“√、O、/、\”等符号均为无效。 3) 答题卡四角应保持平整、不应折角或皱卷,以免影响阅卷机工作。 4) 如需更改答案时,应先用橡皮擦净后,再划线答题。 5、试卷二为翻译试题,共翻译1段文章,请根据参加考试的级别选择一段翻译。一律用钢笔或圆珠笔答在答题纸上。字迹应尽量下整,用字规范,以免影响阅卷。 6、考场内考生只允许带2B铅笔、橡皮、尺子、钢笔或圆珠笔。其它词典、书本、资料和电子词典、BP机、手机、掌上电脑等工具一律不准带入场内。 7、遵守考场纪律,不得有交头接耳、左顾右盼、抄带纸条等作弊行为,一经发现,立即清除出场,并由人事部门严肃处理。 I. Vocabulary Directions: There are 20 incomplete sentences in this part. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence and mark your answer on the Answer Sheet. 1. Within days he became paralyzed, and people feared that he might die. But he____ A. absorbed B. dissolved C. discovered D. recovered 2. Tilden, the other presidential____, actually received more votes. A. advocate B. candidate C. sponsor D. opponent 3. An Olympic runner wins a ____ A. medal B. model C. modle D. modest 4. To find out how the bees manage to tell time, an unusual experiment was ____ four years ago. A. carried on B. carried away C. carried out D. carried over 5. Every society has its own peculiar customer and __ of acting. A. ways B. behavior C. attitudes D. means 6. They __ their knowledge in the exploding world of ideas. A. modernize B. supply C. update D. upgrade 7. I should like to rent a house, modern, comfortable and __ in a quiet neighborhood. A. all in all B. above all C. after all D. over all 8. It's difficult to divine what constitutes an __ tip in any country. A. appropriate B. thoughtful C. considerable D. sufficient 9. Shipbuilders would not __ their money unless they knew that they could make a profit. A. invest B. invent C. involve D. invite 10. At the end of four years, these six extra hours of each year __ twenty-four hours, or one full day. A. add up to B. make up for C. come up with D. put up with 11. Don't __ this news to the public until we give you the go-ahead. A. release B. relieve C. relate D. retain 12. Earth is one of nine planets which __ around the sun. A. spin B. roll C. rotate D. revolve 13. "No sense in you getting us both killed!" I yelled __ him. A. at B. with C. to D. out 14. What you have done is __ the doctor's orders. A. attached to B. responsible to C. resistant to D. contrary to 15. I want to express the __ of all of us, for this wonderfully warm welcome. A. appreciation B. enjoyment C. evaluation D. reputation 16. We hire and __ people mainly for their ability to do business. A. proceed B. progress C. promise D. promote 17. According to government mandate in the Lion City, tipping is not __ A. admitted B. remitted C. permitted D. emitted 18. The environmental costs were regarded more as temporary inconveniences than as__ liabilities. A. imaginative B. peculiar C. persistent D. original 19. Scientists predict that the world's known oil resources will __ early in the next century. A. run off B. run out C. run up D. run over 20. Now a person works for a certain amount of money __ he can pay for food and clothing. A. in case B. so that C. as to D. such as II. Grammatical Structure Directions: There are 20 incomplete sentences in this part. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence and mark your answer on the Answer Sheet. 21. The basic rock material is referred to__ A. as the matrix B. be the matrix C. by scientists to be the matrix D. as being the matrix 22. The oil industry of India __ two World Wars and withstood the economic, social and political upheavals of a particularly troubled century. A. survived B. has survived C. was survived to D. has been surviving 23. Although baleen whale may weigh __ twenty elephants, it feeds on sea plants and animals. A. so much to B. as much to C. so much as D. as much as 24. Man uses the energy for everything from flying to the moon to __ about it. A. think B. thought C. thinking D. will think 25. __ his arms over his head, Lincoln declared he was the "big buck of the lick". A. Wave B. Waving C. Waved D. Been waved 26. __ retire are still able to receive pension that they have paid into the social security system during their working days. A. Most people B. Since most people C. Most people are D. Most people who 27. The reward was not always given to everyone, nor __ to those who deserved it most. A. it was not given B. was it given C. it was not given nor D. was not it given 28. Between 1890 and 1970 the monetary costs of supplying energy __ more or less constant or declined. A. to stay B. was stayed C. stayed D. has stayed 29. The water __ Manhattan has been very important to New York. A. surround B. is surrounded C. surrounding D. surrounded 30. The assumption __ human cloning rests is that all genetic cells contain exact copies of the original set of genetic instructions. A. on which B. on that C. at which D. which 31. For the creatures to become oil, it was necessary that they __ between layers of rock for an enormous length of time. A. been imprisoned B. shall be imprisoned C. should be imprisoned D. will be imprisoned 32. The gas-oil contact or gas-water contact __ the lower limit of producible gas. A. is B. are C. were D. has been 33. There is also an interest in sea horses, puffers and other salty types with shapes __ and colors__ than even the showiest of fresh-water fish. A. more strange...more bright B. stranger...brighter C. stranger...more bright D. more strange...brighter 34. __ was a planted sapling of the American redwood tree. A. There is one of the gifts B. One of the gifts that C. That one of the gifts D. One of the gifts 35. An air ship __ by energy from the sun has been suggested. A. powering B. to power C. is powered D. powered 36. Most scientists agree __ was hot for at least a time. A. some of the moon that B. some of the moon it C. that some of the moon D. while some of the moon 37. A group of scientists demanded that the federal government __ all the studies it has funded on cloning. A. reveal B. revealed C. is revealing D. must reveal 38. __ hearing is really produced in all animals by the effect of pressure is not definitely known by scientists. A. If or not B. Whether or not C. Thought D. Even if 39. It was something we __ A. never hear of B. have never heard of C. never heard of D. had never heard of 40. "Could I borrow your bike? .... Yes, you__" A. can B. could C. would D. may III. Reading Comprehension Section A Directions: There are 5 passages in this section. Each passage is followed by 4 questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark your answer on the Answer Sheet. Questions 41 to 44 are based on the following passage: Saudi Arabia, OPEC's cautious giant, understands that high oil prices can fuel inflation in consuming economies, forcing central banks to rein in demand and thus pushing oil prices down again, and that high retail prices for petrol can create political problems for Europe's and America's leaders. When Bill Clinton met Saudi Arabia's Crown Prince Abdullah this week, Mr. Clinton argued for an output rise big enough to put an end to these painful prices. Prince Abdullah has promised to "make every effort to ensure equilibrium in the oil markets and to stabilize prices." This week he revealed that Saudi Arabia has been quietly leaking an extra 600,000 barrels per day on to the market since July in an effort to cool prices. If that is true, it just goes to show that managing the oil markets is easier said than done. Despite several Saudi-inspired output increases by the cartel in recent months, the price has remained stubbornly high; this week, it soared to nearly $50 a barrel, the highest since the Gulf war in 1990. As the cartel's oil ministers gather in Vienna on September 10 to hammer out new production quotas, they are once again under intense pressure to release more oil, and fast. To hear OPEC members talk, you might think that serious price relief is on the way. There is discussion of "managing" prices down through a newish price mechanism. At the cartel's meeting in March, ministers quietly agreed to a grand new plan to keep oil within a target band of $22-28 a barrel. If the price of a basket of seven OPEC crudes stays below $22'for 20 trading days, the cartel is supposed to cut production by 500,000 barrels a day. If it stays above $28 for 20 trading days, it will automatically raise production by the same amount. This price band has become the main topic of discussion in advance of the upcoming gathering of ministers. Prince Abdullah even talks of a return to a stable market within months. Oil traders and analysts note that the 20-day limit looks likely to be triggered again this week. A new report by Lehman Brothers, an investment bank, echoes the view of many: "Our expectation is that production will be increased by 500,000 bpd, either through the price mechanism or through a separate agreement." When it released new figures suggesting that domestic oil-stock levels are lower than previously thought, the American government's Energy Information Administration added that it too expects an increase of that size. Adding support to this theory are mumblings from OPEC delegates in support of the mechanism. Two decades ago, the ministers of the cartel gathered in Indonesia to hammer out details of a clever new scheme: a mechanism whereby the price of oil would be fixed, and adjusted every quarter automatically for such factors as inflation and currency fluctuations. Members had agreed on the ambitious plan, except for one crucial detail: at what price to start this price-peg crawling. The cautious Saudis, the self-proclaimed guardians of the oil market, wanted a price below $30 a barrel; the hawks in the cartel, unconcerned about consumers' pain, demanded a much higher price. The ensuring bickering ensured that the scheme collapsed. History may now be repeating itself. When the current price-stabilization scheme was first unveiled, punters with short memories placed big bets that the cartel would adhere to it. By mid-June, the price basket had sailed past the 20-day upper trigger. But OPEC did not "automatically" release 500,000 barrels. various confused and contradictory explanations surfaced from ministers, but not the oil. Only at their next officially scheduled meeting did they come up with a meagre quota increase. 41. The passage confirms that A. high oil prices can be controlled if OPEC increases oil output. B. Bill Clinton accomplished his mission for the visit to Prince Abdullah. C. Abdullah made all his efforts to control oil price without considering the benefits of his own country. D. managing the oil market is easier said than done. 42. How many oil price schemes were recommended by OPEC ministers according to the passage? A. One B. Two C. Three D. Four 43. What's the author's opinion about Saudi Arabia? A. Saudi Arabia is the largest country among the members of OPEC. B. Saudi Arabia is the most active country in OPEC to control oil prices for the benefit of the rest of the world. C. Saudi Arabia is the guardian of the world oil market. D. Saudi Arabia seems to have strong intention to control the oil prices to a acceptable level, but it takes actions very carefully for the considerations of its own benefit. 44. What can you infer from the passage? A. OPEC is, in most cases, not reliable. B. All the members of OPEC have the intention to lower oil prices when the prices get very high. C. The oil prices are fully controlled by the market and OPEC can do nothing with them even though they wish to. D. In most cases OPEC has been very efficient in managing oil prices. Questions 45 to 48 are based on the following passage: The horse preceded man on earth. Although the earliest remains of primitive horses have been found on the North American continent, many scientists believe this small species traveled over a land mass in the Bering Sea to found the beginnings of the modem horse in Asia. It became extinct in America. Other scientists believe that the horse may have originated in Asia. In any event the animal soon spread into China, Europe, and the Middle East. The first modem horses to the introduced into the American continent came with the early Spanish explorers. Horses were bred into many types. The heavy horses developed in the low countries of Europe and were used for work and by the medieval knights to hold them and their heavy armor. The oldest breed of horse is said to the Arabian. The only true wild horses left in the 20th century are found in Mongolia. Horses are said to rate in intelligence after the ape, elephant, and dog. They have excellent memories and can sometimes find their way home when lost, and sense danger better than their masters. The early civilizations of man that had and made use of the horse developed more rapidly than those which did not. 45. Some of the characteristics of the horse are A. poor memories B. great loyalty C. more intelligent than the dog D. in some areas they can surpass the abilities of man 46. The horse originated A. in the Middle East B. in Europe C. on the North American continent D. in Spain 47. The primary uses of the horse for early man were A. for food B. for prestige C. to make money D. to work for him 48. What can be said about the varieties of horses? A. The-early horses were larger than the more modem breeds. B. The only true wild horses left in the 20th century are in the Middle East. C. The oldest breed of the modem horse is said to be the Arabian. D. Medieval knights preferred fast, active horses. Questions 49 to 52 are based on the following passage: Recent intrusions into the lives of public figures have highlighted the lack of laws guarding privacy in Britain. As a result, one issue under discussion as Parliament returns this week is the possible introduction of legislation to curb press powers. The government will probably take no action until it receives a report from a committee chaired by Sir David Calcutt, due in January 1993. The committee is examining whether the press should be regulated by tougher legislation. It is also considering the ways in which the press has invaded the private lives of the famous. The Calcutt committee has reported once before, in 1990. Its recommendations led to the creation of the Press Complaints Commission, under which the press was given the chance to regulate itself without the need for a privacy law. It also proposed a new criminal offence of physical intrusion to obtain information for publication. This proposal, which was not acted upon, would have made it unlawful to photograph people on private property or record their conversations without permission. It would have made it an offence to enter a property to place a bug or obtain personal information. The committee said that the press should be allowed to invade the privacy of a public figure only when it was likely to expose or prevent criminal activity, otherwise his or her private life should be left alone. But a general law protecting privacy was rejected. Since then, reports in some newspapers and magazines about people's private lives have ignored the committee's recommendations. The private lives of Government Ministers and members of the Royal Family have featured prominently in the press. Photographs of the Duchess of York Sunbathing in France, for example, have been widely published. Some sections of the media justify their intrusion by saying it is in the public interest. In a democracy, they argue, the public has a right to know what people in positions of power are doing. Politicians and others are accountable for their lives. Privacy laws, these critics say, would protect the privileged. Additionally, many politicians use their private lives to gain popular support, for example by parading their families before cameras to emphasize "traditional values". Hence, some editors say they are justified in prying into private lives to uncover any faults. Likewise, the Royal Family is supported from public funds, and therefore it is argued that its members should lead responsible private lives. 49. Which of the following occurred secondly in Britain? A. A report from a committee chaired by Sir David Calcutt. B. Intrusion into the lives of public figures. C. Introduction of legislation to curb press power. D. The Government's action to protect privacy. 50. Which of the following can be inferred from the passage? A. The press has more freedom to publish privacy of the famous after the foundation of the Press Complaints Commission. B. To photograph public figures on public property is legal. C. A privacy law is unnecessary since the press has the ability to regulate itself. D. The Press Complaints Commission was formed out of the press and thus did something in favour of the press. 51. What kind of people are likely to appreciate the invasion of their private life? A. The members of Calcutt committee. B. Royal family members. C. Pop stars. D. Some government leaders. 52. Which is a lawful purpose for intrusion into privacy? A. To disclose criminal activity. B. To be in agreement with Privacy Law. C. To gain popular support. D. To protect the privileged. Questions 53 to 56 are based on the following passage: When did sport begin? If sport is, in essence, play, the claim might be made that sport is much older than humankind for, as we all have observed, the beasts play. Dogs and cats wrestle and play ball games. Fishes and birds dance. The apes have simple, pleasurable games. Frolicking infants, school children playing tag, and adult arm wrestlers are demonstrating strong, transgenerational and transspecies bonds with the universe of animals- past, present, and future. Young animals, particularly, tumble, chase, run wrestle, mock, imitate, and laugh (or so it seems) to the point of delighted exhaustion. Their play, and ours, appears to serve no other purpose than to give pleasure to the players, and apparently, to remove us temporarily from the anguish of life in earnest. Some philosophers have claimed that our playfulness is the most noble part of our basic nature. In their generous conceptions, play harmlessly and experimentally permits us to put our creative forces, fantasy, and imagination into action. Play is release from the tedious battles against scarcity and decline which are the incessant, and inevitable, tragedies of life. This is a grand conception that excites and provokes. The holders of this view claim that the origins of our highest accomplishments - liturgy, literature, and law - can be traced to a play impulse which, paradoxically, we see most purely enjoyed by young beasts and children. Our sports, in this rather happy, nonfatalistic view of human nature, are more splendid creations of the nondatable, transspecies play impulse. 53. The best title for the passage is __ A. Games for Animals B. The Origins and Meaning of Play C. A Playful View of Modem Philosophy D. The Role of Sport in Child Development 54. It seems to the author that young animals play in order to __ A. gain pleasure B. learn specific behavior patterns C. delight their owners D. exercise their growing muscles 55. One may infer from the passage that play is important to adults because it helps them A. understand their children B. interact more with animals and nature C. channel their creativity. D. improve their physical strength 56. The word "noble" (in para.2) could best be replaced by which of the following? A. snobbish B. wealthy C. royal D. admirable Questions 57 to 60 are based on the following passage: To ensure similarity in scientific investigation or monitoring, nationally and internationally agreed standards are being introduced. Several systems of documenting experimental methods and procedures are in use today and are becoming increasingly important for indicating data quality and verifying the integrity of studies. One such approach is Good Laboratory Practice which was introduced in 1982 by the Health and Safety Executive to monitor the testing of industrial chemicals. Since 1982 the range of laboratories inspected has been extended to include those working with pharmaceuticals, agrochemicals, cosmetics and food additives. Good Laboratory Practice is concerned with the way laboratory or field studies are planned, monitored, recorded and reported and the conditions under which this occurs. Following the principles of GLP ensures that the studies are properly planned, can be adequately carried out and are fully and accurately reported. As part of the planning, execution and reporting of a study, the various processes carried out are carefully documented as Standard Operating Procedures. The value of long-term observation of environmental factors has only been recognized relatively recently although some monitoring of the environmental factors have been in existence for over a century. The best known long-term study is probably the Broadbalk Experiment at Rothamsted. Broadbalk and the other long-term experiments at Rothamsted and elsewhere are now proving to be extremely valuable by answering questions not considered, nor even conceived, when they were originally set up. Even so they are limited in geographic scope and by the fact that they are confined to one land use category. Current environmental and ecological monitoring networks, while not limited geographically, have in the main been set up to measure just one aspect of the environment. In contrast, the Environmental Change Network (ECN) was set up to give added value to long-term monitoring and data collection by providing a network of sites in different parts of the U.K. and under a variety of land use conditions where comparable long-term data on a wide variety of environmental variables could be recorded. The idea of a network such as ECN was first considered in the mid 1970s but the concept did not reach fruition until 1992. The selection of the initial network of terrestrial sites was based on a range of criteria. One of the most important requirements, given the intended long-term nature of the project, was financial security although consistent quality of research was also required. The project intended that other sites representing more variable climate zones and land use will eventually join the network as funding becomes available. The monitoring carded out at each ECN site covers a range of physical, chemical and biological measurements. Where possible procedures and measurements used by existing national monitoring schemes are employed so that ECN provides an integrating function for the more extensive sectorial networks. Environmental changes due to factors such as climate change are likely to be difficult to identify against the background noise arising from the numerous sources, both natural and man-made, of environmental variability. It is desirable, therefore, to minimize any additional variation due to operator involvement. To this end, and to ensure consistency and repeatability, protocols for each of the key measurements were produced. 57. How many experiment(s) was (were) conducted on the monitoring of the environmental factors? A. Unknown B. Two C. Three D. One 58. What does the underlined word mean in "One such approach is Good Laboratory Practice which was introduced in 1982 by the Health and Safety Executive to monitor the testing of industrial chemicals." A. Performance B. Standard C. Experiment D. Repetition 59. Which is the correct description of "Environmental Change Network"? A. It is a network which is expected to provide~ environmental and ecological data representing more geographical areas. B. It is a current environmental and ecological network to measure only one aspect of the environment. C. Environmental Change Network remained functioning until 1992. D. Environmental Change Network was set up to make long-term monitoring of environment more costly. 60. The passage implies, though it does not explicitly state, that __ is (are) the most promising approach to the long-term monitoring of environmental factors. A. Broadbalk Experiment B. Good Laboratory Practice C. Environmental Change Network D. Standard Operating Procedures Section B Directions: There are I0 blanks in the following passage. For each blank there are four choices marked A, B, C and D. You should choose the ONE that best fits into the passage. Then mark your answer on the Answer Sheet. Until recently most historians spoke very critically of the Industrial Revolution. They 61 that in the long run industrialization greatly raised the standard of living for the 62 man. But they insisted that its 63 results during the period from 1750 to 1850 were widespread poverty and misery for the 64 of the English population. 65 contrast, they saw in the preceding hundred years from 1650 to 1750, when England was still a 66 agricultural country, a period of great abundance and prosperity. This view, 67 , is generally thought to be wrong. Specialists 68 history and economics, have 69 two things: that the period from 1650 to 1750 was 70 by great poverty, and that industrialization certainly did not worsen and may have actually improved the conditions for the majority of the populace (平民). 61. A. admitted B. believed C. claimed D. predicted 62. A. plain B. average C. mean ' D. normal 63. A. momentary B. prompt C. instant D. immediate 64. A. bulk B. host C. gross D. magnitude 65. A. On B. With C. For D. By 66. A. broadly B. thoroughly C. generally D. completely 67. A. however B. meanwhile C. therefore D. moreover 68. A. at B. in C. about D. for 69. A. manifested B. approved C. shown D. speculated 70. A. noted B. impressed C. labeled D. marked IV. Translation Directions:There are 1 passages in this part of the test. You are to translate the passages into Chinese on your Answer Sheet. A级: 71. The chemical industry depends very heavily on petroleum and natural gas as sources of raw materials. It is likely that in excess of 80% of the literally thousands of different basic organic chemicals employed today are derived from these sources. The petrochemical industry has grown with the petroleum industry. As is the case with the latest trends in changing crude oil types, it must also evolve to meet changing technological and humanitarian needs. The manufacture of chemicals from petroleum and natural gas constituents is an excellent example of the conversion of such materials to more valuable products. The individual chemicals made from petroleum and natural gas are numerous and include industrial chemicals, household chemicals and paints, as well as intermediates for the manufacture of products, such as synthetic rubber and plastics. The processing of petroleum hydrocarbon to yield materials that are, essentially, the building blocks of other chemicals industries, is now very extensive. The classification of materials such as petrochemicals is used to indicate the source of the chemical compounds, but it should be remembered that many common petrochemicals can be made from other sources, and the terminology is therefore a matter of source identification. 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简介
职业:山东鑫淼化工有限公司 - 设备工程师
学校:泉州师范学院 - 化学与生命科学学院
地区:四川省
个人简介:攻克科学堡垒,就像打仗一样,总会有人牺牲,有人受伤,我要为科学而献身。查看更多
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